/*
 * Created on 2/08/2011
 *
 * Copyright 2011 Prometheus Consulting.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package nz.co.senanque.perspectivemanager;

import java.io.Serializable;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;

import nz.co.senanque.madura.bundle.BundleListener;
import nz.co.senanque.madura.bundle.BundleRoot;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.BeansException;
import org.springframework.context.MessageSource;
import org.springframework.context.support.AbstractMessageSource;

/**
 * 
 * Simple example implementation of a bundle listener
 * 
 * @author Roger Parkinson
 * @version $Revision:$
 */
public class BundleListenerImpl implements BundleListener, Serializable
{
	private static final long serialVersionUID = 7147632840139484367L;
	private Logger m_logger = LoggerFactory.getLogger(this.getClass());
	
	private MessageSource m_messageSource;

	private Map<String,SubApplication> m_subApplications = Collections.synchronizedMap(new HashMap<String,SubApplication>());
    /* (non-Javadoc)
     * @see nz.co.senanque.madura.bundle.BundleListener#add(java.lang.String, nz.co.senanque.madura.bundle.BundleRoot)
     */
    public void add(String bundleName, BundleRoot root)
    {
        m_logger.debug("added bundle {}",root.getProperties().get("bundle.name"));
        String bundleNameNoVersion = (String)root.getProperties().get("Bundle-Name");
        try {
        	SubApplication subApplication = (SubApplication)root.getApplicationContext().getBean("SubApplication");
        	SubApplication existing = m_subApplications.get(bundleNameNoVersion);
        	if (existing == null || (existing.getVersion().compareToIgnoreCase(subApplication.getVersion()) < 0))
        	{
        		// If this is the latest version of this bundle then set the app message source as the parent message source
        		// and add the sub application to the map.
        		AbstractMessageSource messageSource = (AbstractMessageSource)subApplication.getMessageSource();
        		messageSource.setParentMessageSource(getMessageSource());
        		m_subApplications.put(bundleNameNoVersion, subApplication);
        	}
		} catch (BeansException e) {
			// ignore bundles with missing bean, assume they do something else.
		}
    }

    public void remove(String bundleName, BundleRoot root)
    {
        m_logger.debug("removed bundle {}",root.getProperties().get("bundle.name"));
        m_subApplications.remove(bundleName);
    }

	public Collection<SubApplication> getSubApplicationValues() {
		return m_subApplications.values();
	}

	public Map<String, SubApplication> getSubApplications() {
		return m_subApplications;
	}

	public void setSubApplications(Map<String, SubApplication> subApplications) {
		m_subApplications = subApplications;
	}

	public MessageSource getMessageSource() {
		return m_messageSource;
	}

	public void setMessageSource(MessageSource messageSource) {
		m_messageSource = messageSource;
	}

}
